Bozeman weather by month
Measured at Bozeman/Gallatin Fld
Averages and records for each calendar month at Bozeman/Gallatin Fld, United States, from 1941 to 2026. The warmest month is July, averaging 29.4°C; the coolest is January at −1.0°C.
| Month | Avg high | Avg low | Record high | Record low | Years |
|---|---|---|---|---|---|
| January | −1.0°C | −14.0°C | 15.6°C24 January 1953 | −43.3°C26 January 1957 | 84 / 84 |
| February | 1.8°C | −11.1°C | 18.9°C24 February 1995 | −41.7°C4 February 1989 | 84 / 84 |
| March | 6.5°C | −7.1°C | 26.1°C20 March 2026 | −39.3°C4 March 2019 | 84 / 84 |
| April | 12.8°C | −1.9°C | 30.0°C19 April 1962 | −20.6°C3 April 1970 | 84 / 84 |
| May | 18.1°C | 2.9°C | 33.3°C19 May 1954 | −10.0°C9 May 2002 | 84 / 85 |
| June | 23.2°C | 6.7°C | 37.8°C30 June 1990 | −3.3°C3 June 1951 | 85 / 85 |
| July | 29.4°C | 9.6°C | 41.1°C6 July 2007 | −1.1°C16 July 1944 | 85 / 85 |
| August | 28.5°C | 8.7°C | 39.4°C5 August 1961 | −2.8°C25 August 1992 | 85 / 85 |
| September | 22.0°C | 3.9°C | 37.8°C5 September 2020 | −9.4°C29 September 1985 | 84 / 85 |
| October | 14.6°C | −1.4°C | 31.7°C3 October 2010 | −28.8°C26 October 2020 | 84 / 84 |
| November | 5.6°C | −7.7°C | 24.4°C5 November 2009 | −37.8°C16 November 1959 | 84 / 84 |
| December | 0.2°C | −12.6°C | 18.9°C1 December 2021 | −43.3°C24 December 1983 | 84 / 85 |
Years shows the number behind the average high, then the number holding a record for that month. They differ because a year contributes an average only when the month has at least 25 days of readings, while a single reading is enough to set a record. The average low is withheld on the same 25-day rule and is counted separately again; it is shown as a dash where the archive cannot support it. Across the twelve months here the averages rest on 84 to 85 years each.
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Climate at nearby stations
The closest stations with twelve months of archive of their own, nearest first.
Every figure on this page is computed from NOAA GHCN-Daily observations stored per station, per year, per month. Nothing is modelled, interpolated or estimated, and a month the archive never covered is left out rather than filled in. A station appears here only once all twelve months carry an average from at least 10 years. See how this is built.